package com.sky.aspect;

import com.sky.annotation.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;
import java.time.LocalDateTime;

@Aspect
@Slf4j
@Component
public class AutoFillAscpect {
    /**
     * 切点
     * @param
     */
    @Pointcut("execution(* com.sky.mapper.*.*(..)) && @annotation(com.sky.annotation.AutoFill)")
    public void autoFillPoinCut() {}

    @Before("autoFillPoinCut()")
    public void autoFill(JoinPoint joinPoint) {
        log.info("开始进行公共字段自动填充");

        // 获取到当前被拦截的方法上注解的参
        MethodSignature signature=(MethodSignature) joinPoint.getSignature();
        AutoFill autoFill=signature.getMethod().getAnnotation(AutoFill.class);
        OperationType operationType=autoFill.value();
        // 获取到当前被拦截的方法的参数
        Object[] args=joinPoint.getArgs();
        if (args==null || args.length==0) {
            return;
        }
        Object entiry=args[0];
        //准备赋值的数据
        Long currentId= BaseContext.getCurrentId();
        LocalDateTime now=LocalDateTime.now();

        if (operationType==OperationType.INSERT) {
            // 插入操作
            try {
                Method setCreateTime=entiry.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
                Method setCreateUser=entiry.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER, Long.class);
                Method setUpdateTime=entiry.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser=entiry.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);

                setCreateTime.invoke(entiry,now);
                setCreateUser.invoke(entiry,currentId);
                setUpdateTime.invoke(entiry,now);
                setUpdateUser.invoke(entiry,currentId);

            }catch (Exception e){
                e.printStackTrace();
            }
        }else if (operationType==OperationType.UPDATE) {
            // 更新操作
            try {
                Method setUpdateTime=entiry.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser=entiry.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);

                setUpdateTime.invoke(entiry,now);
                setUpdateUser.invoke(entiry,currentId);

            }catch (Exception e){
               e.printStackTrace();
            }
        }


    }
}
